alea-tem3

Bubble


Falling


Time

Broad Question:

Dose a Bubbles Size Determined its Falling Time?

Specific Question

Will a Large(10-15mm), Medium(5-10mm) or Small(0-5mm) Bubble have a shorter Falling Time?

Variables

Independent Variable:

• Size of Bubble

Dependent Variable:

• Falling Time (sec)

Variables That Need To Be Controlled:

• The dropping height
• Same Bubble Soap
• Same distance of Camera
• try for same wind speed

http://childreach.files.wordpress.com/2009/09/bubbles.jpg?w=490

Hypothesis

I hypothesize that the smallest bubbles will take the longest to hit the ground, followed by the medium bubbles and then the large bubbles.




Graph of Hypothesis

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http://childreach.files.wordpress.com/2010/06/soapbubble.jpg?w=490

Experimental Design

I am going to conduct an experiment to inform people about if bubble size determines falling time. Since the height is important and temperature i will conduct this at my house.There will be three people in my experiment. I am going to blow the bubbles while one of my friends takes the picture, another person record the data and directs.
I will blow eighteen bubbles and test them. there well be three different kinds, Large, regular and small. Each size range will have six trials. All the data well be written down, then typed on my x-drive. I will also take pictures and video. Then posted on my wiki and then print and put on my poster.

Materials List

• Small bubble stick and soap
• Large bubble stick and soap
• Regular size bubble stick and soap
• Data sheet or regular sheet of paper to record data
• two camera
• Video camera (optional)
• Writing utensil

Detailed Procedure

1. Go to a place where something can be dropped a far distance.
2. One person goes to the top of the place with the bubbles.
3. Another person has a camera ready to take a picture of the bubble.
4. Another person has the piece of paper and a writing utensil ready to right down information and have stop watch ready.
5. The person who is blowing the bubbles blows a small bubble.
6. The person with the camera takes a picture of the bubble 5ft away.
7. The person with the stop watch records falling time.This person also take pictures of the bubble falling.
8. Repeat steps 5-7 six times.
9. Now the bubble blower will blow regular size bubbles.
10. The person with the stop watch will time how long it takes to hit the ground then record data.
11. The person with the camera takes a picture of the bubble 5ft away from them.
12. Repeat steps 9-11 six times.
13. The bubble blower will blow a large bubble,.
14. The person with the stop watch will time how long it takes to hit the ground then record data.
15. The person with the camera takes a picture of the bubble 5ft away from them.
16. Put the data on the computer and clean up the mess.

http://childreach.files.wordpress.com/2010/06/soap_bubbles_rgb.png?w=490&h=367

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Background Research

• Bubbles have three layers. A top layer of soap, and middle layer of water and the smaller layer of soap again.
• Surface Tension holds a bubble together.
• The film of a bubble is less then a thousandth of a millimeter thick like a wavelength of light.

• Air resistance makes different size or massed object fall at different times.
• Velocity is the speed it takes for an object to fall.

• Its better if you make your wand wetter. Weather differs bubble size. If black band forms around a bubble it means it going to pop.
• you can find the size of an bubble.
• the biggest bubble is 105.4 cubic feet
• March 20 to 26, 2006, is "National Bubble Week, i plan on doing my experiment hopefully during this week

References

"BUBBLES! Facts and Fun from Learning Express Toys." Learning Expressions. 25 Mar. 2011. Web. 19 Jan. 2012. <__http://learningexpressblog.typepad.com/blog/2011/03/blog-bubbles-facts-and-fun-from-learning-express-toys.html__
Hammond, Richard. Can You Feel the Force? New York, NY: Susan Leonard, 2006. Print.
Parker, Lewis. Gravity. Logan, IA: Perfect Learning Corporation, 2006. Print
Word Record Bubbles. 4 Apr. 2006. Web. 19 Jan. 2012. <__http://www.bubbleblowers.com/facts.html__>.

http://childreach.files.wordpress.com/2010/06/soapbubbles.jpg?w=490&h=342

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Results

Data Table

Results Graphs

Photos

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Data Analysis

Conclusion

The purpose of this experiment was to see which size bubble takes the longest to hit the ground. I used three different sized bubble stick holes; a big one, small one and a regular one. The results of my experiment were that the large bubbles (7.05 sec) took the longest, then the small bubbles (5.31sec) and the regular bubbles (4.94sec). Surprisingly the regular bubbles took the least amount of time and the large ones took the most.

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Discussion

My Hypothesis was that the smallest bubbles would take the longest to hit the ground, followed by the medium bubbles and then the large bubbles. My results didn’t support my hypothesis. Some patterns and trends were that the larger bubble stayed in the air the longest and didn’t automatically fall. the relationship between the independent variable (the size of the bubble) and the deped variable (the falling time) wasn’t strong. The relationship wasn’t strong because the large bubble didn’t always take the longest to fall. The average showed it took the longest. In all the trials, it wasn’t the longest to fall. I don’t think my test went smoothly. I don’t think it went smoothly because a bunch of bubbles came out at the same time and we didn’t have a real measurement of 5ft. If i could improve my experiment I would be more accurate with height ,take more pictures and try to make one bubble come out. An interesting future study would be ways to make a bubble stay in the air longer. If we figured that out, the size of a bubble wouldn't matter for keeping it in the air.

Web Photos Citations:

http://blissthefamily.wordpress.com/2010/02/04/shiny-bubbles/
http://robertwensman.wordpress.com/2010/03/12/utvecklingens-paradox/
http://childreach.files.wordpress.com/2009/09/bubbles.jpg?w=490
http://childreach.files.wordpress.com/2010/06/soapbubble.jpg?w=490

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